Which of the Following Is an Example of a Reversible

Which of the following is an example of a reversible process?

A) An ice cube at 0°C melts while in a water bath at 0°C.
B) A hand pump is rapidly compressed and the pressure and temperature in the pump rise. The pump is held in position as the temperature drops to the ambient temperature.
C) A stick of dynamite explodes.
D) A high pressure air tank at room temperature has its valve opened and the gas in the tank rushes out until the pressure in the tank is equal to atmospheric pressure.
E) A car engine burns fuel to produce motion of the car and exhausts the 140°C waste products of the combustion into the 20°C atmosphere.